Abstract

The electronic structure of quasi-one-dimensional (quasi-1D) blue bronze, , was investigated by angle-dependent x-rayabsorption near-edge structure(XANES)spectroscopy at O and K and Mo edges along the quasi-1D octahedron-chain direction, i.e., the axis, and the octahedron-in-plane direction, i.e., the axis, well below its Peierls phase transition temperature . The O -edge XANESspectra indicate that the angle dependence of O hybridization, especially those with the character, is more significant along the axis than along the axis. Similar trend is also observed in the Mo-edge XANESspectra. The K -edge XANESspectra reveal anisotropic effect of hybridization of K states with O states on the octahedron.